Andorid生命周期01

本文通过一个具体的示例,详细介绍了Android中Activity从启动到销毁的整个生命周期过程,并展示了如何通过代码记录不同生命周期方法的调用顺序。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

l练习从一个Activity转向的另一个Activity

package com.Activity_Lifecycle; import android.app.Activity; import android.content.Intent; import android.net.sip.SipAudioCall.Listener; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class Activity_LifecycleActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); System.out.println("FirstActivity--->onCreate()"); setContentView(R.layout.main); Button myButton = (Button)findViewById(R.id.starSecondActivity); myButton.setOnClickListener(new MyButtonListener()); } //内部类实现对按钮mybutton的监听 class MyButtonListener implements OnClickListener { public void onClick(View v) { Intent intent = new Intent(); intent.putExtra("test", "hello,bing"); intent.setClass(Activity_LifecycleActivity.this,SecondActivityLifecycle.class ); Activity_LifecycleActivity.this.startActivity(intent); } } @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); System.out.println("FirstActivity--->onDestroy()"); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); System.out.println("FirstActivity--->onPause()"); } @Override protected void onRestart() { // TODO Auto-generated method stub super.onRestart(); System.out.println("FirstActivity--->onRestart()"); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); System.out.println("FirstActivity--->onResume"); } @Override protected void onStart() { // TODO Auto-generated method stub super.onStart(); System.out.println("FirstActivity--->onStart"); } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); System.out.println("FirstActivity--->onStop"); } } package com.Activity_Lifecycle; import android.app.Activity; import android.os.Bundle; public class SecondActivityLifecycle extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); System.out.println("SecondActivity--->onCreate"); setContentView(R.layout.second); } @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); System.out.println("SecondActivityonDestroy()"); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); System.out.println("SecondActivityonPause()"); } @Override protected void onRestart() { // TODO Auto-generated method stub super.onRestart(); System.out.println("SecondActivityonRestart()"); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); System.out.println("SecondActivityonResume"); } @Override protected void onStart() { // TODO Auto-generated method stub super.onStart(); System.out.println("SecondActivityonStart"); } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); System.out.println("SecondActivityonStop"); } } package com.Activity_Lifecycle; import android.app.Activity; import android.content.Intent; import android.net.sip.SipAudioCall.Listener; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class Activity_LifecycleActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); System.out.println("FirstActivity--->onCreate()"); setContentView(R.layout.main); Button myButton = (Button)findViewById(R.id.starSecondActivity); myButton.setOnClickListener(new MyButtonListener()); } //内部类实现对按钮mybutton的监听 class MyButtonListener implements OnClickListener { public void onClick(View v) { Intent intent = new Intent(); intent.putExtra("test", "hello,bing"); intent.setClass(Activity_LifecycleActivity.this,SecondActivityLifecycle.class ); Activity_LifecycleActivity.this.startActivity(intent); } } @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); System.out.println("FirstActivity--->onDestroy()"); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); System.out.println("FirstActivity--->onPause()"); } @Override protected void onRestart() { // TODO Auto-generated method stub super.onRestart(); System.out.println("FirstActivity--->onRestart()"); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); System.out.println("FirstActivity--->onResume"); } @Override protected void onStart() { // TODO Auto-generated method stub super.onStart(); System.out.println("FirstActivity--->onStart"); } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); System.out.println("FirstActivity--->onStop"); } }

 

 

 

 

 

在从第一个Activity转向第二个Activity时 记录生命周期的各个调用时间

在第二个Activity点击返回按钮时,画面转回第一个Activity 生命周期示例如下

 

认识Task--什么是Task?

A task is a stack of activity 。Task就可以理解为一个任务栈。

 

 

 

 

 

ssssssssssssssssssssssssssssssssss

评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值